Dr. Who (Tom Baker discovers a sinister interference with earthlings in suspended animation. Harry: Ian Marter. Sarah: Elisabeth Sladen. Vira: Wendy Williams. Noah: Kenton Moore. Rogin: Richardson Morgan.

An 8-million-year-old skull is the subject of experiments. Tom Baker, Louise Jameson. Colby: Edward Arthur. Thea: Wanda Ventham. Ted Moss: Edward Evans. Tyler: Geoffrey Hinsliff. Fendelman: Denis Lill.

Two alien seed pods are found buried in the Antarctic permafrost and the Doctor realises that they are from a Krynoid, a form of plant life that infects and transforms all animal life on planets upon which it becomes established.

The White Guardian gives the Doctor a quest to find the six disguised segments of the Key to Time which, when assembled, will be used to restore the balance of the cosmos. To aid him he is given a new companion, a female Time Lord called Romana, and a tracer device.

A newly regenerated Doctor joins UNIT in an investigation into the theft of top secret plans and equipment from supposedly secure premises. Sarah discovers that the raids have been carried out by a robot invented by scientist Professor Kettlewell while he was working for Think Tank, a body involved in developing emerging technologies.

The fourth segment of the Key to Time provokes an identity crisis. Dr. Who: Tom Baker. Romana: Mary Tamm. Count Grendel: Peter Jeffrey. Zaker: Simon Lack.

The Doctor and Leela search for a spaceship carrying colonists and the gene bank of their race. Tom Baker, Louise Jameson. Jackson: James Maxwell. Tala: Imogen Bickford-Smith. Orfe: Jonathan Newth. Herrick: Alan Lake.

Two alien seed pods are found buried in the Antarctic permafrost and the Doctor realises that they are from a Krynoid, a form of plant life that infects and transforms all animal life on planets upon which it becomes established.

"The Time of the Doctor" features the final appearance of Matt Smith as the Eleventh Doctor and the first regular appearance of Peter Capaldi as the Twelfth Doctor. Janna Coleman is featured as the Doctor's companion Clara Oswald. This episode includes several enemies of the Doctor from the Cybermen, Silence, Daleks and Weeping Angels. Oh my!

The Doctor and Jo arrive on the medieval planet Peladon, where the Doctor is mistaken for a human dignitary. The Doctor plays along until he discovers a conspiracy to sabotage the planet's attempt to join the Galactic Federation. Compiles episodes 5 through 9 from "Doctor Who" series 9.

Two alien seed pods are found buried in the Antarctic permafrost and the Doctor realises that they are from a Krynoid, a form of plant life that infects and transforms all animal life on planets upon which it becomes established.

The Doctor and Romana encounter a spaceship carrying sacrifices to the Minotaur-like Nimon. Tom Baker, Lalla Ward. Pilot: Bob Hornery. Teka: Janet Ellis.

The Doctor finds his TARDIS colliding with an interstellar replica of the famous ocean liner Titanic orbiting present-day Earth, during a Christmas party. With the help of a waitress named Astrid (Kylie Minogue) and several passengers, the Doctor must take on the race called the Heavenly Host as the lives of the Titanic crew and those on Earth are in danger. The angels have been tasked with killin...

An archaeologist opens an ancient grave despite a witch's warnings.

Christmas Eve 1892 and a chilling menace threatens humankind - but with the Doctor in mourning, it takes old friends and an unorthodox young governess to get him fighting to save the world again.

The Doctor's search for Clara brings him to London, where Wi-Fi is everywhere. Humanity lives in a Wi-Fi soup but something dangerous is lurking in the signals, picking off minds and imprisoning them...

On the rings of the planet Akhaten, the Festival of Offerings is in full swing. Clara meets the Queen of Years but something is stirring in the pyramid, and a sacrifice will be demanded.

The Doctor and Clara land on a submarine in 1983 as it spirals into the ocean depths with an alien creature loose. With tempers flaring and nuclear weapons on board, the whole of humanity is at stake!

"The Time of the Doctor" features the final appearance of Matt Smith as the Eleventh Doctor and the first regular appearance of Peter Capaldi as the Twelfth Doctor. Janna Coleman is featured as the Doctor's companion Clara Oswald. This episode includes several enemies of the Doctor from the Cybermen, Silence, Daleks and Weeping Angels. Oh my!

The Doctor and Clara travel to the haunted Caliburn House. Within its walls, a ghost hunting Professor and a psychic search for the Witch of the Well. Her apparition appears, but is she really a ghost?

The TARDIS has crashed, Clara is lost inside, and the Doctor has 30 minutes before his ship explodes!

Something ghastly is afoot in Victorian Yorkshire, as bodies are found with their skin a waxy, glowing red.

Hedgewick's World of Wonders: the perfect theme park day out. And ground zero for a deadly silver resurrection.

When the Doctor arrives in Victorian London, he finds a dinosaur rampant in the Thames and a spate of deadly spontaneous combusions. Who is the new Doctor and will Clara's friendship survive as they embark on a terrifying mission into the heart of an alien conspiracy? The Doctor has changed.